Insulator for vacuum circuit breaker



FIG. 1 is a front, top and left side perspective view of an insulator for vacuum circuit breaker, showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a cross-sectional view thereof; taken in the direction of line 6-6 of FIG. 3; and,

FIG. 7 is a cross-sectional view thereof; taken in the direction of line 7-7 of FIG. 3. 

CLAIM The ornamental design for an insulator for vacuum circuit breaker, as shown and described. 